This is the RFID transponder circuit we are using, and I would like you to check the schematic connections to see if they are correct.
The circuit is catered for both self-powered and external (3.6V) powered configurations
Self-power configuration - R37 = DNP and connect 0 ohms to R35.
External (3.6V) power configuration – R35 = DNP and connect 0 ohms to R37.
Please let me know if my configurations are correct.
Hello @pragashsangaran,
Hope you are doing well.
For UCODE G2iM, OUT pin is a digital output that can be used for tamper loop, a small external circuit or as indicator; these configurations require VDD pin to be externally suppled.
If you populate R35, it will introduce a galvanic connection that will activate the "tamper indicator" bit, as per Tag Tamper Alarm feature (please see AN10940 FAQs on UCODE G2i, Chapter 16). Is this the intended purpose for your application?
For external supply, the following configuration is required:
Regards,
Eduardo.
Hi Eduardo.
How can I configure this RFID chip for self-powered operation? Self-power means instead of supplying DC power to the chip, the RFID signal which converted to DC powers the chip.
Hi Eduardo,
Are you saying that this chip cannot be configured to operate as a self-powered RFID transponder using RFID energy? need external power to power it up?
Hi Eduardo,
i have two cases for my product.
1) externally powered (3.6V) RFID transponder.
2) self-powered (RFID powered) RFID transponder.
i have sent the schematic above. i believe the schematic is good for case 1). You said case 2) won't work. can you propose changes for case 2).
Hi,
The interrogator provides an RF field that powers the tag. External supply is required for additional features of the chip, such as boost read/write range or digital output.
Regards,
Eduardo.
Hi,
Please consider that an external power supply should be connected as follows (between VDD and RFN):
If there is a galvanic connection between VDD and OUT pins, it will activate the tamper alarm. According to AN10940 FAQs on UCODE G2i, Section 16, tamper feature and external supply mode cannot be used at the same time.
I will recommend you taking a look at the AN11237 UCODE G2iM+ demo board documentation, Fig 3 and Fig 5 for some reference connections.
Regards,
Eduardo.
Hi Eduardo,
Even when my schematic doesn't show RFN connected to GND, actually, RFN is connected to GND, so my schematic is good for an external power supply. I understand the VDD and OUT pins are connected together for the tamper alarm and not for the self-powering condition.
My only question now is, how to connect the schematic for a self-powering RFID transponder? Self-powering means the power is supplied via RFID energy.